Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quantas pessoas participaram da pesquisa da Rasmussen Reports em 13 de outubro de 2010?
 ###Tabelas: CREATE TABLE owned-and-operated (owned-and-operated_id AUTO_INCREMENT PRIMARY KEY, City of license/market VARCHAR, Station VARCHAR, Channel TV ( RF ) VARCHAR, Year of affiliation INT, Year of disaffiliation INT) CREATE TABLE general_election (general_election_id AUTO_INCREMENT PRIMARY KEY, Poll source VARCHAR, Date(s) administered VARCHAR, Sample size VARCHAR, Margin of error VARCHAR, Jerry Brown (D) VARCHAR, Meg Whitman (R) VARCHAR) CREATE TABLE race_results (race_results_id AUTO_INCREMENT PRIMARY KEY, Rnd INT, Race Name VARCHAR, Pole position VARCHAR, Fastest lap VARCHAR, Winning driver VARCHAR, Winning team VARCHAR, Report VARCHAR) CREATE TABLE list_of_hat-tricks (list_of_hat-tricks_id AUTO_INCREMENT PRIMARY KEY, No. INT, Season INT, Bowler VARCHAR, Batsmen VARCHAR, For VARCHAR, Against VARCHAR, Ground VARCHAR, Scorecard VARCHAR) CREATE TABLE playoff_statistics (playoff_statistics_id AUTO_INCREMENT PRIMARY KEY, Name VARCHAR, Nationality VARCHAR, Position VARCHAR, Appearances INT, Starts INT, Minutes INT, Goals INT, Assists INT)  
SELECT Sample size FROM general_election WHERE Poll source = rasmussen reports AND Date(s) administered = october 13, 2010